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24 CHAPTER 2: INSTALLING THE SWITCH
When another Switch 4200 Series unit is added to the top of an
established stack, no stack renumbering occurs. If however the unit being
added takes the stack height above 4 then the ‘up’ port on the top unit
of the existing stack will be disabled and its LED will flash green. You will
then not be able to use that port again until the link is lost on that port.
When removing a Switch from a stack, note the following:
■ Removing a Switch 4200 Series unit from the bottom of an existing
stack will cause the remaining stack to renumber.
■ Removing a Switch 4200 Series unit from the middle of an existing
stack will cause the other Switches in the stack to divide into two
stacks. Units below the unit removed will not renumber, units above
will renumber.
■ Removing a Switch 4200 Series unit from the top of an existing stack
will have no effect on the remaining stack.
If you are having problems, refer to “Solving Stack Formation Problems”
on page 56
.
The Power-up
Sequence
The following sections describe how to get your Switch 4200 Series
powered-up and ready for operation.
Powering-up the
Switch 4200 Series
Use the following sequence of steps to power-up the Switch.
1 Plug the power cord into the power socket at the rear of the Switch.
2 Plug the other end of the power cord into your power outlet.
The Switch powers-up and runs through its Power On Self Test (POST),
which takes approximately 10 seconds.
Checking for Correct
Operation of LEDs
During the Power On Self Test, all ports on the Switch are disabled and
the LEDs light in a set sequence.
When the POST has completed, check the Power On Self Test LED to
make sure that your Switch is operating correctly. Table 6
shows possible
colors for the LED.
DUA1730-0AAA02.book Page 24 Thursday, January 23, 2003 12:28 PM